The rowing app that actually understands rowing

By the Watta Team · Updated 10 August 2026

Watta uses AI to extract your workout data from Concept2 screen photos. No manual entry, no clunky interfaces — just snap, track, and train smarter with Effort Scores that capture what split time alone cannot.

Rowing App for Rowers: Watta is a free, AI-powered rowing workout tracker. Snap your erg screen to capture data instantly. Get a 0-100 Effort Score combining cardiac load, work output, pacing, and economy. Track heart rate zones via the Karvonen method. Join clubs and squads to train with your crew.

The Problem

Manual workout logging is tedious

Most rowers abandon training logs because entering splits, stroke rate, distance, and intervals by hand after every session is a chore. Important data gets lost or never recorded.

Split time alone does not tell the full story

A 2:00 split at rate 18 is fundamentally different from a 2:00 split at rate 28. Without factoring in stroke rate, heart rate, and workout context, raw pace gives an incomplete picture of effort and fitness.

No single app connects erg, social, and progress

Rowers juggle Concept2 Logbook for metres, Strava for social sharing, and spreadsheets for training plans. There is no unified place to log, analyse, and share erg sessions.

How Watta Helps

📸

AI-Powered OCR Logging

Take a photo of your Concept2 PM5 screen and Watta extracts split, distance, stroke rate, time, and intervals automatically. Your workout is logged in seconds.

🎯

Effort Score Algorithm

A proprietary 0-100 score that combines cardiac load, work output, pacing, and stroke economy. Finally, a single number that captures the true intensity of every session.

👥

Social Feed & Clubs

Share workouts with your rowing community, join clubs, follow teammates, and compare sessions. Built for the way rowers actually train — together.

How It Works

Snap your erg screen

Take a photo of your PM5 display after your workout. Gallery upload works too.

AI extracts your data

Watta reads every metric — time, split, distance, stroke rate, heart rate, and calories.

Get your Effort Score

A 0-100 score combining cardiac load, work output, pacing, and economy shows exactly how hard you worked.

Watta is Available Now

Download Watta and start tracking your workouts today.

Download on the App Store

Frequently Asked Questions

Does Watta work with Concept2 ergometers?

Yes. Watta is optimised for Concept2 rowing ergometers with PM5 monitors. The AI-powered OCR accurately reads split time, distance, stroke rate, time, and interval data directly from screen photos.

How is the Effort Score calculated?

The Effort Score is a 0-100 composite metric. It weights Cardiac Load (40%), Work Output (35%), Pacing (15%), and Economy (10%). This gives you a single number that reflects the true physiological demand of each session.

Can I sync my workouts to Strava?

Yes. Watta syncs your erg workouts to Strava automatically, creating activities with your split, distance, and time data so your training appears alongside your other activities.

Is Watta free to use?

Watta offers free workout logging with AI-powered OCR, Effort Scores, and social features. Download the app and start tracking your erg sessions today.

Every erg counts.

Photograph your erg screen after the piece and Watta logs it for you.